臺灣博碩士論文加值系統

本研究利用高分子混掺方法，以「酚醛樹脂-聚乙二醇」(PF-PEG)為有機模板，矽酸鈉為氧化矽(SiO2)來源，在pH值大約為5.0，藉由PF-PEG與SiO2之間的氫鍵作用力，自組成具介尺度結構之「PF-PEG-SiO2」奈米複合體，最後在氮氣下高溫碳化得到「氧化矽-碳」奈米複合材料。
我們將氧化矽-碳複合材料直接應用在保溫碳材。當適當的矽酸鈉溶液含量及碳化溫度所製作出來的氧化矽-碳複合材料，蓄熱比竹炭快，保溫則與竹炭相當。此外，因製程簡單，故可大量生產以取代竹炭，成為新的保溫材料。
將氧化矽-碳複合材料移除氧化矽之後，得到具有高表面積、良好孔洞性與孔洞體積之中孔洞碳材。當此碳材載入金屬氧化物，在氮氣或氬氣環境下，經過500~900 ℃處理，金屬氧化物利用碳材上的碳而還原成金屬，而且此碳材除了保持原有親水性，更具有磁性。當碳材在乙炔/氬氣環境下，溫度大於700 ℃，金屬氧化物與乙炔反應在碳球表面生成碳管或碳纖，成功得到高導電性「碳管-中孔洞碳材」複合材料。
最後，同樣利用高分子混掺方法，以「酚醛樹脂-F127」(PF-F127)為有機模板，經過適當時間混掺，結合氯化鈣和磷酸，控制溶液之pH值，即產生「酚醛樹脂-F127-磷酸鈣」複合體沉澱。碳化後再用鹽酸將無機物移除，就可成功得到具有表面積1000 m2/g以上與孔洞體積2.0 cm3/g以上之薄膜狀中孔洞碳材，改善了以傳統氧化矽材料為模板製作碳材過程中需用氫氟酸移除氧化矽的缺點。

In this thesis, mesostructured “phenolic formaldehyde resin -poly ethylene glycol-silica” (PF-PEG-SiO2) nanohybrid was synthesized by using PF-PEG polymer blend as organic template and sodium silicate as silica source. At pH » 5.0, the silica species and PEG-PF polymer blend can mutually assembly through the hydrogen-bonding interaction. After carbonization at high temperature under Nitrogen atmosphere, a “silica-carbon” nanocomposite was obtained.
The Silica-Carbon composite can be used directly in the application of solar absorbance. The silica-carbon nanocomposite prepared with a proper amount of sodium silicate solution and carbonization temperature shows better heat absorbing efficiency and similar heat releasing rate related to bamboo carbon. Because of the simple synthetic process, the silica-carbon nanocomposite can be easily synthesized in a large scale that can replace the bamboo carbon to be used as a new solar absorbance material.
After removed silica part of the silica-carbon nanocomposite, a mesoporous carbon with high surface area and large pore volume was obtained. When a proper amount of metal oxides were loaded onto the surface of the mesoporous carbon, and then treated at 500 - 900 ℃ under inert gas environment, a hydrophilic “metal@carbon” material with magnetism can be synthesized via a reduction procedure of the metal oxides by the carbon. When the metal oxide loaded onto the mesoporous carbon was treated at above 700 ℃ in acetylene / argon, the metal oxide can catalyze the growth of the carbon nanofibers or nanotubes on the surfaces of the mesoporous carbon spheres. Thus, a good electric conducting “carbon nanotube-mesoporous carbon” composite can be readily prepared.
In the last part, “PF-F127-calcium phosphate” hybrid was also synthesized by using F127 and PF blend as organic template. With a well control on the blending time, the components of CaCl2 and H3PO4 and pH value, a film-like mesoporous carbon with surface area above 1000 m2/g and pore volume above 2.0 cm3/g was obtained from carbonization and inorganic template removal by using hydrochloric acid. This synthetic method can avoid the disadvantage of using highly dangerous hydrofluoric acid in the silica-removal processes.

1. 序論 1
　1.1 孔洞材料介紹 1
　　1.1.1 中孔洞氧化矽(Mesoporous Silica)材料簡介 1
　　1.1.2 中孔洞碳材(Mesoporous Carbon)簡介 2
　　1.1.3 孔洞性氧化矽材料的研究範疇 3
　1.2 界面活性劑性質簡介 6
　　1.2.1 界面活性劑的分類 6
　　1.2.2 微胞的形成 8
　　1.2.3 界面活性劑聚集體的結構 10
　　1.2.4 塊狀高分子的微胞 11
　1.3 矽酸鹽的基本概念 12
　　1.3.1 pH值小於2.0時的矽酸鹽的聚合反應 (Ⅰ區) 12
　　1.3.2 pH值介於2~7之間的矽酸鹽的聚合反應 (Ⅱ區) 13
　　1.3.3 pH值在7以上的矽酸鹽的聚合反應 (Ⅲ區) 13
　1.4 高分子混摻(polymer blends) 14
　　1.4.1 高分子混摻的概念。 14
　　1.4.2 混摻的方法 14
　1.5 多孔性碳材的製造 16
　　1.5.1 模板法製造多孔性碳材 16
　　1.5.2 高分子混摻方式合成中孔洞碳材 18
　1.6 奈米碳管 20
　　1.6.1 起源 20
　　1.6.2 奈米碳管結構 22
　　1.6.3 奈米碳管的合成 23
　　1.6.4 奈米碳管的各種性質 24
　　1.6.5 奈米碳管元件與應用 25
　1.7 動機與目的 26
　　1.7.1 保溫碳材 27
　　1.7.2 磁性與導電性中孔洞碳材 28
　　1.7.3 「酚醛樹脂-F127(或PEG)-磷酸鈣」複合體製作中孔洞碳材 29
2. 實驗 31
　2.1 化學藥品 31
　2.2 合成方法 32
　　2.2.1 保溫碳材 32
　　2.2.2 磁性與導電性中孔洞碳材 33
　　2.2.3 「酚醛樹脂-F127(或PEG)-磷酸鈣」複合體製作中孔洞碳材 35
　2.3 產物的鑑定 36
　　2.3.1 熱重分析儀 (Thermogravimetn’c analysis；TGA ) 36
　　2.3.2 X-射線粉末繞射光譜 (Powder X-Ray Diffraction；PXRD) 36
　　2.3.3 穿透式電子顯微鏡(Transmission Electron Microscopy ;TEM) 37
　　2.3.4 氮氣等溫吸附/脫附測量 (N2 adsorption/desorption isotherm) 38
　　2.3.5 拉曼光譜(Raman Spectrum) 40
　　2.3.6 紅外線影像測溫儀 41
3. 結果與討論 43
　3.1 保溫碳材 43
　　3.1.1 高分子混摻方式合成「氧化矽-碳」複合材料 43
　　3.1.2 碳化溫度的影響 44
　　3.1.3 氧化矽含量的影響 46
　3.2 磁性與導電性中孔洞碳材 48
　　3.2.1 中空圓球狀中孔洞碳材之合成 48
　　3.2.2 影響中空圓球狀中孔洞碳材表面積及孔洞大小之因素 50
　　3.2.3 工業級矽酸鈉溶液測試 52
　　3.2.4 磁性中孔洞碳材 53
　　3.2.5 高導電性「碳管-中孔洞碳材」複合材料 60
　3.3 「酚醛樹脂-F127(或PEG)-磷酸鈣」複合體製作中孔洞碳材 65
　　3.3.1 「酚醛樹脂-PEG-磷酸鈣」複合體製作之中孔洞碳材 65
　　3.3.2 PF-PEG-磷酸鈣製作之碳材不同合成條件的探討 69
　　3.3.3 「酚醛樹脂-F127-磷酸鈣」複合體製作之中孔洞碳材 71
　　3.3.4 PF-F127-磷酸鈣製作之碳材不同合成條件的探討 74
4. 結論 81
5. 參考資料 83

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